Plow.



E. GRIIVISRUD.

PLow-. v

v APPLlCAlON FILED MAY 29. |917. 1,253,961. Patented Jan.'15,1918.

2 SHEETS-SHEET 1.

ATTOR N EY E. GRIMSRUD.

PLow. APPLICATION FILEDQMAY 29, |917- A Patented, Jan. 15, 1918.

2 SHEETS-SHEET 2.

ATTOH N EY sraans parenti canton.

man. GnIMsn'Un, or ANTELOPE, MONTANA.

PLOW.

To all whom t may concern l Be it known that I, EMIL GRLMSRUD, a citizen of the United States, residing at Antelope, in the county of Sheridan and State of Montana, have inventedy certain new and useful Improvements in Flows, of which the following is a speciication'. l

My invention relates to improvements in plows, and it consists in the constructions, combinations, and arrangements yherein described and claimed.

An object of my invention is to provide `a plow adapted forA use lmore particularly with a tractor, and the plow consistsessenti-ally of a collapsible stock and a suitably arranged trip lever for normally :holding the collapsible stock in position on the plow beam, the kpurpose of the` collapsible lstock being to permit it to 'yield when an immovable obstruction is encountered on the field.

Another object Iof the invention is to pro vide a plow ofthe character described having a spring or 'other suitable equivalent therefor whereby the collapsible stock may be retrieved or returned to its normal operative position when an obstruction is encountered and passed.

Another object ofthe invention is to provide a plow of the character described, which embodies a -novel form of trip lever adapted more particularly for use in connection with the heel of the collapsiblestock of the plow.

Other objects and advantages will appear from the following specication, reference being had to the accompanying drawings, in'

l which .parts being shown in the positions assumed when the collapsible stock encounters an obstruction.

Figs. 4 and are sections on the lines 4 4 and -reSpeCti-velv, of Fig. T1, and

Fig. 6 isa vertical section on the line '6-6 of Fig. 1.

In carrying out -my invention, I n.provide la Specicationlof Letters Patent.

ApplicationftledMay 29, 1917.

lon a bolt 7.

Patented Jan. 15, 1918.

Serial No. 171,728.

plow beam 1 which is provided withia Clev-is 2 whereby the plow beam is adjustably attached to the `draw bar 3 of a tractorthrough the medium of the bolt 4. The vplow beam 1 is bifurcated in order to .provide a space or chamber 5 in which the collapsible plow stock y6 is fulcrumed. n o l The collapsible plow stock 6 is fulorumed A heel V8 which is formed asan extension of the collapsible stock 6, -is provided with a notch 9 whichreceives a transversely disposed bolt 10. The engagement of the bolt 10 with the notch 9 limits the upward movement of the collapsible stock 6. The heel -8 has a toe 11 which has aslit 12 for receiving the heel of a trip 13. The slit 12 merges with a recess 14: into which the nose 15 of a trip lever 16 enters.

A retrieving spring 17 is coiled about a bolt 1`8 which is fulcruined in thek heel 8 of thestock 6. The bolt 18 passes through a guide 19 on which the lower end of the spring 1T bears. The -upper end of the spring 17 bears against the head of the bolt 18 and it will be readily apparent inFigs. 2 and 3, that the retrieving spring 17 will tend to normally keep the stock 6 in the position shown in Fig. rFhe guide 19 bridges the chamber or space and is secured to the bifurcation of the Aplow beam 1.

.A plow share 20 is secured to the vlower end of the collapsible stock, bolt holes 21 and 21u being formed in the stock so that bolts may 'be passed through to secure the share in place. Y

It will be observed that the other hole 21a is elongated in the form of a slot. The pur pose of the slot 21a is to provide a certain amount of movement for the adjustment of the plow 'share 20. For the purpose of ad jlustment, the plow 'share 20 has a lug shown in Fig. 1, through which an adjusting screw passes and engages the rear surface of the collapsible stock 6. A bolt passes through 'the stock andthe slot 21a, andvwhen tightened, securely holds the Lplow shaft 2O in` its adjusted position. Y

A pair of alining abutment openings 22 is formed in the bifurca-ted siflesof the plow 'beam 1. Each of the abutment openings 4.22 is of -a peculiar shape in that a round-ed end A23 Ais provided which merges at `'the bottom with a pair of abutment steps V211. The bottom of each of the openings 22, is substantially Straight between the curvedy pog- 23 and the first abutment step 24. VThe upper step 24 terminates at a recess 25 from which the straightportion at the top of the opening 22 extends and completes the opening.

It will be observed that eachopening 22 is widened at the place adjacent to the steps 24, the provision thus gained permitting suliicient latitude of movement of an abutment 26 formed on each side of the trip lever 16. Under normal conditions, the trip lever 16 assumes a substantially perpendicular position with respect to the plow beam 1. This position is illustrated in Figs. 1 and 2, wherein it will be seen that the recessed end of each of the abutments 26 is superposed on the first of the steps 24. It will also be observed that the opposite end of each of the abutments 26 is round and rests in the rounded portion 23 of the abutment opening 22. The rounded end of the abutment 26 acts as a fulcrum for the trip lever 16 when the collapsible stock 6 is moved from its normal position with respect to the plow beam 1, when an obstruction is encountered on the field.

The recess in the end of the abutments 26 extends completely across the lower end of the trip lever 16, and a wedge-shaped opening 27 is formed centrally of the recess referred to. The pivot head 28 of a tension stad 29 occupies the wedgesshaped opening 27. The pivot head 28 remains in position in the opening 27 by the pressure of a spring 30 on the stati 29. One end of the spring 30 bears against a screw-eye 31 on the staff 29, and the other end bears against an arm 32 which is dependent from a dog 33.

The pressure of the spring 30 against the screw-eye 31 keeps the pivot head 28 in engagement with the wedge-shaped opening 27. It will be seen that the pivot head 28 is narrower than the opening 27 is deep. This is illustrated in Figs. 2 and 3 wherein by comparison of the different positions of the trip lever 16, it will be understood that the lever 16 and the pivot head 28 have slight relatively pivotal movement.

A chamber 34 is formed at the lower end of the trip lever 16. The trip 13 is fulcrumed in the chamber 34 on the pin 35. A spring 36 connected to the screw-eye 31 and the extremity of the long end of the trip 13, keeps the heel of the trip 13 projected beyond the rear edge of the tripV lever 16 so that it may be engaged by a slit 12 in the toe 11 of the stock 6.

A pawl 37 is fulcrumed on the extremity of the long end of the trip 13. The pawl 37 moves in a groove 38 which is an extension of the chamber 34. The lateral edges of the trip lever 16 are notched at 39 to receive the claws 40 of the dog 33. The upper end of the pawl 37 is tapered to Ya point and is adapted to keep the claws 40 of the dog 33 out of engagement with the notches 39 when the collapsible stock 6 is in the normal position shown in Figs. 1 and 2.

The lower claw 40 projectsv beside the pawl 37 as indicated at 4()a to bear against the trip lever, as shown in Fig. 2. The purpose of the pawl 37 is to act upon the dog 33 and keep the claws 40 out of the notches 39, This is accomplished through the movement of the trip 13 when it is engaged by the toe 11. The movement of the trip 13 shoves the pawl 37 upwardly in its groove 38 so that the base and the point 0f the tapered portion of the pawl strike the lower and upper claws 40 at the same time and move the dog outwardly away from the trip lever 16. The spring 3() on the vtension staff 29 serves the double function of keeping the pivot head 28 in place in the opening 27, and also urging the claws 40 of the dog 33 toward the trip lever 16. This will be obvious since it can readily be seen that the pivotal mounting of the dog 33 on the bolt 33a will permit the action described.

A spring 41 is connected at one end to a hook 42 on the upper end of the trip lever 16. The other end of the spring is connected to a similar hook 0n a fixed part of the plow beam. The spring 41 keeps the trip lever 16 in its vertical position by pressing the abutments 26 against the bottoms of the abutment openings 22. The roundparts of the openings and the abutments make it possible that the spring 41 will do this.

The plow stock 6 maybe collapsed by manual efforts4 through the medium of a lever 43 and a link 44 connected between the lever and the trip lever 16. The lever 43 is mount-ed on the platform 45 of the tractor and when the operator knows that an obstruction is being approached, he may ifrit be desired, pull upon the lever 43 when the trip lever 16 will be operated to release the collapsible stock 6 in a manner which will presently be more fully understood. The lever 43 is locked to its adjustment by the usual quadrant and detent connections, and in order to permit freedom of movement of the trip lever 16 when an obstruction is encountered on the field. the end of the linkV 44 is flattened and provided with a slot 44a which receives the securing pin on the lever 43. Ordinarily the pin occupies the upper end of the slot 44 and obviously when the trip lever 16 moves, the link 44 will simply ride over the pin.

The operation of the device is as follows. The plow beam 1 is one of a number which are attached to the draft bar 3 which in actual practice extends diagonally beneath the tractor platform 45. Under normal conditions, the trip lever 16 is perpendicular with respect to the plow beam 1. By refer ai-gaeegeei 'ence more particularly Ito "Fig, "2, it will be seenfthat theA nose .125 oit" the'trip A lever .16 rests VVin the notch l14 in the toe '110i the y'stock 6. `lThe heel of the-trip113 is -alsodisposed in the slit 12 which islocated so'that it acts'as a depressor lfor'theheel of the trip '13. The It'ront end of the trip 13is thus elevated and tension is stored in the spring 36. The pawl 37 is accordingly elevated and `the claws f-lO of the dog 33 are forced away from the notches 39 in the-trip lever 16.

'The nose 15V of the'trip lever 16 formsthe sole support for-the collapsible plow stock 6 `and in actual practice will be made heavy enough to withstand lthe strains imposed Athereon by the Vplow in moving'through the soil. '.Fhe'trip lever l16 is prevented vfrom rocking on Y'the -fulcrums formed by the vrounded portions of 'the abutments i6 vand the openings 22,fby the'spring 411 which is strong enough to prevent "the dislodgment ofthe end of theabutment from the lfirst step Should -an obstruction be now encountered on the iield which is-so great that it cannot "The trip lever 16 will `then tilt tothe position shown in F ig. r3 wherein the recess in the abutments 26 is outof registration or engagementwith the first step 24: and consequen'tly freedom of movement of the lever 16 is permitted when the toe 11 strikes the nose 1'5 when the collapsible stock 6 returns to its former position. It will be understood that the trip lever '16 is 'tilted to the position shownin `Fig. 3,'by the downward movement of the toe 11 when the obstruction on the field above referred 'to strikes thepoint of the'share 20.

VThe claws engage the notches 39 in the front-edge ofthelever '16 when'the lever is ,tilted tothe position shownin Fig..3. The lever is thus held in this position. vrThe y`tapered portion Aof the pawl 37 4isfinv sucha position'relativelyto lthe claws 4:0, that the "claws willbe quickly disengaged fromthe --notches r39 upon. upward movement 'of the piawl.

`When thefobstruction-in'the'field is overcu-rsthe "toe 1110i theheel V8 will yfirst strike fthe vnose '15 and lslightly displace the 'trip 'lever :16. Y:1n lthis instance, the `claws e0 in 'the notches 39 act -as a 'fulcrum Yfor the lever 16 raridthe displacement-ot Jthe lever 16 f oc curs at-'the lower end and against the tension of the-spring 30 on the tensionl stali' "29. yAs

lsoon v'as ,the nose 15 is passed v4'by fthe toe '111,

26 in the similarly rounded'portions of the openings 22.

The heel of the trip 13.is engaged Yinf'turn by thetoe 11, and as the high part vof the toe l'lfrides over theiheel of the. trip 13 just previously tothe slipping of the heel into the slit 12, the trip 13 will be rocked on its fulcrum 35 with the result that the front end will be elevated. When the front end oit' the trip v13 is elevated, the pawl 37 is consequently `slid upwardly so that the claws il@ are disengaged from the notches 39. |The Aspring 4:1 .will then pull the upper end of `the lever 16 `upwardly so lthat the lever finally assumes .the position shown in Figs. -1 and 2.

Theobvious advantage :of a plow having a collapsible stock as illustrated in'thedrawings, is `that no attention need `be paid to obstructions intheiield. The use oftractors to draw great numbersaoli plows across a field-has made'the pro-vision of an automatically operated device for lovercoming obstructions fon the lield, necessary. The breaking of a plow-stock whenthe plow/encounters a rockor snag on'the `iield,.is not an infrequent occurrence. vWhen la plow stock is thus broken, much time is necessary in making repairs. An expedientcommonly used to overcome the'breakage of the plow stock, is to mount the stock on the beam in such amanner thatit maybe held in place by a soft metal pin. The purpose of the pin is to permit the plow stock to swing after the pin is sheared by reason of the the encountering of an obstructionby the plow.

.In either vevent considerable vtime is lost and it isthe purpose 'of Vthe present invention 'to obviate the necessity of stopping for repairs by yproviding 'an automatically .collapsible plow stock which is perfectly rigid under normall conditionsbut will yield when 'an obstruction is encountered.

While `the vconstruction and v.arrangenfient toi the :deviceasiillustiated' in the rdrawings,

"that .of a v"generally preferred form, 4obviously modications fand .changes ytherein may "be made "without ldeparting from -the spirit .ofthe invention or .'thescope'of the claims.

1 claim:-

1. .A iplow vloeam, a plow stock "fulcrumed en the beam the plow stock having a heel. a rripjlever having a "nose ,enga'geable with the '.heel,.a:holding spring connected to `the trip lever `the spring being adapted to Abe Iovercomexwhenthe plowstoclr ,encounters an obstruction, a normally inactive dog adapted to engage and hold 'the trip lever -subsequently itothe AdisplaicerrlentV of the 'trip lever y.when :the stock strikes an obstruction, and

means mounted on the trip lever engageable upon the return of the plow stock for releasing the trip lever from the dog.

2. A plow beam provided with openings having round ends and steps, a plow stock tulcrumed on the plow beam the stock -hav- .ing a heel, a trip lever having a nose engageable with the heel, abutments on the trip lever, the abutments having round ends for pivotally engaging the round ends ot the openings, recessed ends for engaging the steps, and means for keeping the round ends of the abutments in the round portions of the openings.

3. A plow beam provided with an opening having a round end and a step, a plow stock fulcrumed on the beam the stock having a heel. a trip lever having an abutment resting in the opening. the abutment having a recess,

s said abutment having a round end for pivotal connection with the round portion of the opening, a nose on the trip lever engageable with the heel, a tension stati having a pivot located in the recess, and resilient means on the tension stati' for urging the abutment into pivotal connection with the rounded end oi the opening.

4. A plow beam having an opening, a plow stock fulcrumed on the beam, a trip lever having a nose engageable with the stock. a ralorum-abutment on the trip lever, the fulcrum abutment being receivable in the opening in the plow beam, a tension statil having a pivot head'for engaging the abutment, and a spring on the tension stati for urging the fulcrum-abutment into position in the opening in the plow beam.

5. The combination with the plow beam, oi a trip lever having a pivotal mounting on the beam, a plow stock adapted to displace the trip lever upon the encounter ot an obstruction, a dog for holding the trip lever in its displaced position, and a trip carried by the trip lever and actuated upon the return of the stock tor releasing the trip lever from the dog.

6. The combination with a plow beam, of a trip lever having a pivotal mounting on the beam, a plow stoclr` adapted to displace the trip lever upon the encounter of an obstruction, a dog for holding the trip lever in its displaced position, a trip carried by the trip lever enga geable by the stock upon the return of the stock to a normal position, and a pawl carried bv the trip for releasing the trip lever from the dog.

7. The combination with a plow beam, of

a trip lever having a pivotal mounting on the beam, a plow stock adapted to displace the trip lever lupon the encounter of an obstruction,a dog t'or holdingthe trip lever in its displaced po-sition, a trip carried by the trip lever engageable by the stock upon the return of the stock to a normal position, a pawl carried by the trip for releasing the trip lever from the dog, and means for holding the pawl in a normally inactive position.

.8. The combination with the plow beam, of a trip lever having pivotal connection therewith, the lever having achamber and a lroove a low stock tulcrumed on the beam therewith, the lever having a chamber and a groove, a plow stock fnlcrumed on the beam and adapted to displace the trip lever upon the encounter of an obstruction. a dog. have ing claws 'for engaging and holding the trip lever in the displaced position, a trip pivoted in the chamber engageable upon return of the stock, a pawl joined willi'the trip and slidable in the groove for disengaging thev trip lever from the claws ot' the dog, and resilient means for restoring the triplever to the former position upon release thereof from the claws.

10. rlhe combination with the plow beam,

of a trip lever having a nose and a notch,`

a plow stock sustained by the nose and adapted to displace the trip lever on the encounter ot an obstruction by the plow stock, a dog engageable with the notch when the trip lever is displaced. a trip tulcrumed on the trip lever engageable by the plow stock when in the normally sustained position,

and a pawl carried by the trip in engagement with the dog for holding the dog from engagement with the notch.

11. The combination with the plow beam, of a trip lever having a nose and a notch, a plow stock sustained by the nose and adapted to displacethe trip lever on the encounter ot an obstruction lby the plow stock, a dog engageable with the notch when the trip lever is displaced, a trip fulcrumed on the trip lever engageable by the plow stock when in the normally sustained position. a pawl carried by the trip in engagement with the dog` for holding the dog from engagement with the notch, and a resilient element jointed with the trip for retracting the pawl from the dog when the stock encounters an obstruction and the trip lever is displaced.

' 12. A plow beam, a'collapsible stock fulcrumed on the beam, a step formed on the beam, a trip lever for sustaining the stock, the trip lever being fulcrumed adjacentto the step and normally having engagement therewith, the trip being moved from engagement with the step upon collapse of the stock, a tension stati'l having a resilient element .for holding the trip lever on the ulcrum. and a dog adapted to engage and hold the trip lever from the step upon eollapse of the stock.

13. In a plow having a beam, the combination with a dog having an arm, a plow stock fulcrumed 0n the beam and being 'susceptible to collapse, a stock sustaining lever adapted to assume a tilted position upon collapse of the stock, and a tension staff having a resilient element engaged with and disposed between the 'stock sustaining lever and the arm whereby the stock sustaining lever is held on its fulcru'm.

1a. A plow beam, a stock fulcrumed on the beam, the stock having a heel, a trip lever having a nose for engaging the heel and sustaining the stock from collapse, said trip lever being adapted to assume a tilted position upon the collapse of the stock, means for holding the lever in its tilted position, and resilient means connected with the trip lever for permitting the heel to snap past the nose upon the return of the stock.

15. A plow beam, a stock fulcrumed on the beam, the stock having a heel, a trip lever having` a nose for engaging the heel and sustaining the stock from collapse, said trip lever being adapted to assume a tilted position upon the collapse of the stock, means for holding the lever in its tilted position, resilient means connected with the trip lever for permitting the heel to snap past the nose upon the return of the stock, and means for automatically returning the stock.

16. A plow beam, a stock fulcrumed on the beam, the stock having a heel, a trip lever having a nose for engaging the heel and sustaining the stock from collapse, said trip lever being adapted to assume a tilted position upon the collapse of the stock, means for holding the lever in its tilted po- 'sition,'resilient means connected with the i trip lever for permitting the heel to snap past the nose upon the return of the stock, means for automatically returning the stock, and means for automatically releasing the lever holding means.

17. A plow beam, a stock fulcrumed on the beam, a stock having a heel, a trip lever having a nose for engaging the heel and sustaining the stock from collapse, said trip lever being adapted to assume a tilted position upon the collapse of the stock, means for holding the said lever in its tilted position, and a pivot head yieldably retaining said trip lever in a set position at its lower end, whereby said heel may snap past said nose upon the return of the stock, and means for automatically returning the stock.

18. A plow beam, a stock fulcrumed on said beam, said stock having a heel, a trip lever having a nose for engaging said heel and retaining said stock in a releasable set position, said trip lever being adapted to assume a tilted position upon the collapse of the stock, means for holding the said lever in its tilted position, said lever having an opening formed adjacent its lower end, a pivot head extending into said opening, a spring pressed shaft engaging said pivot head, thereby yieldably retaining the lower end of said lever in a set position, whereby said heel may snap past said nose upon the return of the stock, and means for automatically returning the stock.

19. A plow beam, a stock fulcrumed on said beam, said stock having a heel, a trip lever having a nose for engaging said heel and retaining said stoel; from collapse, said trip lever being adapted to assume a tilted position upon the collapse of the said stock, a dog for holding said lever in its tilted position, an arm projecting from said dog, said trip lever having an opening formed adjacent its lower end, a pivot head extending into said opening, a shaft connected to said pivot head and proj ecting through said arm, a spring carried by said shaft and urging said head and arm in opposite directions, whereby the lower end of said lever will be yieldably retained in a set position, thereby permitting said heel to 'snap past the said nose upon the return of the stock, and means for automatically returning the said stock.

In testimony whereof I atiix my signature in presence of two witnesses.

EMIL GRIMSRUD. llVitnesses O. B. HEREN, EDW. E. T. Risi-IOFF.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

